Ruger Mark III and Hollow Firing Pin Stop Pin

[Scout21]

I helped a friend disassemble their Ruger Mark III recently. We were going over the thing and noticed that it has a very slight dent on the breech face from the firing pin striking it. I hopped on Google and apparently Ruger used a solid pin originally, but went with a hollow roll pin for a short time on the Mark III before ultimately returning to the solid pin. Supposedly the hollow pins would collapse after repeated use of the pistol. Is this an actual issue? Is the damage likely due to the roll pin collapsing? Is the slight amount of peening of the breech face a real issue to begin with? My friend states that they've never had any issues with the pistol after many, many rounds, so I'm curious if it's something that should simply be ignored or if it will become a major issue in the future. Ruger supposedly also used a roll pin on the 10/22 for a while, so now I'm concerned for my 10/22 and will be checking on it soon.

 

[Demi-human]

Not only is the pin peening the breech, the entire bolt has impacted it. That is a whole lot of fire right there.
While the roll pin may be collapsed a little, the firing pin is definitely worn where it meets it. A new solid pin stop and firing pin would cease further peening. Now may be a good time for an upgrade from TK or VQ.
While there isn’t much one can do about the current breech damage, and shouldn’t because it still functions, there is a tool that can press the peened area out of the chamber if it affects feeding.
My MKIII has a roll pin and shows no peening, but I don’t dry fire rimfires very often, even if they are alleged to handle it. Savages leave an entire square mark above the pin, as their stop is just ramming the whole thing into the breech.

Snap Caps or a #6 drywall anchor are your friend’s friends.

Wish I could help with the 10/22, but I don’t have one.